I have a Quarq XX1 MTB PM for sale. It has 175mm length cranks, a BB30 / PF30 bottom bracket and a 156mm Q factor.
It is in good condition and only has a couple of paint chips on the drive side crank arm near the spider.
I have never had any trouble with it and have included a couple of screenshots from the Qalvin software showing it has the current firmware and is currently working well. Also included is a new battery, 2 x new pedal washers, some plastic spacers and a pair of used Race Face crank end protectors. Pls PM me for any further information. Happy to include reasonable postage costs with the sale. Pls call me if you would like any further information. Kind regards, Darren Spina. 0457 831332